bbb bbc bbe bbg bbk bbl bbn bcb bcc bce bcg bck bcl bcn be- beb bec bee beg bek bel ben bgb bgc bge bgg bgk bgl bgn bkb bkc bke bkg bkk bkl bkn blb blc ble blg blk bll bln bnb bnc bne bng bnk bnl bnn c-- cbb cbc cbe cbg cbk cbl cbn ccb ccc cce ccg cck ccl ccn ce- ceb cec cee ceg cek cel cen cgb cgc cge cgg cgl cgn ckb ckc cl- clb clc cle clg clk cll cln cn- cnb cnc cne cng cnl cnn ebb ebc ebe ebg ebk ebl ebn ec- ecb ecc ece ecg eck ecl ecn eeb eec eee eeg eek eel een egb egc ege egg egl egn ekb ekc eke ekg ekl elb elc ele elg elk ell eln en- enb enc ene eng enk enl enn gbc gbe gbg gbk gbl gbn gcb gcc gce gcg gck gcl gcn ge- geb gec gee geg gek gel gen ggb ggc ggg ggn gkb gkn glb glc gle glg glk gll gln gnb gnc gne gnl gnn kbb kbc kbe kbk kbl kbn kcb kcc kce kcg kck kcl kcn ke- keb kec kee keg kek kel ken kgb kgc kgl kkb kkc kke kkk kkl kkn kl- klb klc klg kn- knc kne kng knk knl knn lbb lbc lbe lbg lbk lbl lcb lcc lce lcg lck lcl lcn leb lec lee leg lek lel len lgb lgc lge lgg lgk lgl lgn lkb lkg lkl llb llc lle llg llk lll lln lnb lnc lne lng lnk lnl lnn nbb nbc nbe nbg nbk nbl nbn ncb ncc nce ncg nck ncl ncn ne- neb nec nee neg nek nel nen ngb ngc nge ngg ngk ngl ngn nkc nke nkk nkn nlb nlc nle nlg nlk nll nln nnb nnc nne nng nnk nnl nnn